英语词汇“acranial”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	acranial
释义	acranial, a.\|əˈkreɪnɪəl\| [f. mod.L. Acrania, n. pl., applied by Haeckel to the lowest type of Vertebrata, represented by the Amphioxus or Lancelot: see prec.] 1870Rolleston Anim. Life 32 In all Vertebrata, with the exception of the Amphioxus, which is hence called ‘Acranial,’ the neural canal widens considerably in the anterior region of the body.1878Bell Gegenbauer's Elem. Comp. Anat. 444 The indifferent stage in which the head is found in the Acrania makes it impossible to distinguish any distinct cephalic skeleton.
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